Methods of manufacturing an implantable pulse generator

ABSTRACT

Disclosed herein is an implantable pulse generator feedthru configured to make generally planar electrical contact with an electrical component housed within a can of an implantable pulse generator. The feedthru may include a feedthru housing including a header side and a can side, a core within the feedthru housing, a generally planar electrically conductive interface adjacent the can side, and a feedthru wire extending through the core. The feedthru wire may include an interface end and a header end, wherein the header end extends from the header side and the interface end is at least one of generally flush with the generally planar interface and generally recessed relative to the generally planar interface.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a division of U.S. patent application Ser. No.13/413,478, filed Mar. 6, 2012, now U.S. Pat. No. 8,560,071, which is adivision of U.S. patent application Ser. No. 12/182,097, filed Jul. 29,2008, now U.S. Pat. No. 8,155,743.

FIELD OF THE INVENTION

The present invention relates to medical apparatus and methods. Morespecifically, the present invention relates to implantable pulsegenerator feedthrus and methods of manufacturing and installingfeedthrus.

BACKGROUND OF THE INVENTION

Implantable pulse generators 5, such as defibrillators, pacemakers orimplantable cardioverter defibrillators (“ICD”), are used to provideelectrotherapy to cardiac tissue via implantable medical leads 7. Asshown in FIGS. 1A and 1B, which are isometric views of variousembodiments of a pulse generator 5, a common pulse generator 5 mayinclude a header 10 and a can or housing 15. The can 15 is typicallymade of titanium or another biocompatible metal and serves as ahermetically sealed enclosure for the pulse generator's electroniccomponents (e.g., output flex, hybrid, or various other electroniccomponents or circuit boards, printed circuit boards (“PCB”), etc.)contained in the can 15.

As indicated in FIG. 1A, the header 10 may include connector blocks 20and a molded portion 25 (shown in phantom) that encloses the blocks 20.Each block 20 includes an opening 35 configured to receive therein andmate with a connector end 40 of a lead proximal end 45, thereby formingan electrical connection between the connector block 20 and the leadconnector end 40 and mechanically securing the proximal end 45 of thelead 7 to the header 10 of the pulse generator 5.

As illustrated in FIG. 1B, the header 10 may also include an RF antenna37 that is enclosed by the molded portion 25. One end of the RF antenna37 may be physically and electrically connected to the can 15 via an RFtab or anchor 38 on a header side of the can 15. The other end of the RFantenna 37 is physically and electrically connected to a feedthru wire60 of the feedthru 55. The RF antenna 37 allows the implantable pulsegenerator 5 to wirelessly communicate with a programmer, such as acomputer (not shown). The RF antenna 37 may be coupled to the feedthru55 and the tab 38 by welding, soldering, brazing, etc.

The header-molded portion 25 informed of a polymer material. Passages 50(shown in phantom in FIG. 1A) extend from the exterior of the moldedportion 25 to the openings 35 in the blocks 20, providing a pathway forthe lead distal ends 40 to pass through the molded portion 25 and enterthe openings 35.

As can be understood from FIGS. 1A and 1B, the can 15 may include afeedthru 55 that may electrically connect via a feedthru wire 60 to anRF antenna 37, as shown in FIG. 1B, and feedthrus 55 that mayelectrically connect with respective connector blocks 20 in the header10, as shown in FIG. 1A.

As indicated in FIG. 2, which is a cross-sectional elevation of one ofthe feedthrus 55 of FIG. 1A, the feedthru 55 extends through the wall 65of the can 15. The feedthru wire 60 extends through the feedthru 55 andprojects from the header and can sides 70, 75 of the feedthru 55. Thefeedthru 55 provides a hermetically sealed pathway for the feedthru wire60 to extend between the electronic components 80 housed within the can15 and a connector block 20 or RF antenna 37 of the header 10.

As shown in FIG. 2, the electronic components 80 housed within the canwall 65 may include or be mounted on a PCB 85. The term “printed circuitboard”, “PCB” or “circuit board” as used herein describes a component 80that is often planar in configuration and may be used to mechanicallysupport and electrically connect the electronic components 80 populatingthe PCB 85. Electrically conductive pathways or traces on the PCB 85 mayprovide the electrical connections between the electronic components 80populating the PCB 85. The electrically conductive pathways or tracesmay be etched from sheets of electrically conductive metal (e.g.,copper, gold, etc.) laminated onto a non-conductive substrate.

As illustrated in FIG. 2, the feedthru wire 60 extending from thefeedthru can side 75 extends through a through-hole 90 in the PCB 85.Once extended through the PCB through-hole 90, the feedthru wire 60 issoldered in place. This through-hole method of connecting the feedthruwire 60 to the PCB 85 is disadvantageous for at least a couple ofreasons. First, because the feedthru wire 60 extends through both sidesof the PCB 85, both sides of the PCB 85 in the vicinity of the wire 60must be kept free of electronic components, which waste space within thecan 15. Second, the feedthru wire 60 has to be overly long to allow itto pass completely through the PCB 85, which adds to the material costof the pulse generator 5. Third, aligning the wire 60 with and passingthe wire 60 through the through-hole 90 is time consuming, which adds tothe assembly time associated with assembling the pulse generator 5.

There is a need in the art for a feedthru that reduces the manufacturingcosts associated with manufacturing a pulse generator. There is also aneed in the art for a more economical method of electrically coupling afeedthru wire to the electronic components housed within the can.

BRIEF SUMMARY OF THE INVENTION

Disclosed herein is an implantable pulse generator feedthru configuredto make generally planar electrical contact with an electrical componenthoused within a can of an implantable pulse generator. In oneembodiment, the feedthru includes a feedthru housing including a headerside and a can side, a core within the feedthru housing, a generallyplanar electrically conductive interface adjacent the can side, and afeedthru wire extending through the core. The feedthru wire includes aninterface end and a header end, wherein the header end extends from theheader side and the interface end is at least one of generally flushwith the generally planar interface and generally recessed relative tothe generally planar interface.

Disclosed herein is an implantable pulse generator. In one embodiment,the pulse generator includes a header, a can, a feedthru, and anelectrical component housed within the can. The feedthru extends betweenthe header and can and includes a header side, a first generally planarelectrically conductive interface opposite the header side, and afeedthru wire extending through the feedthru from the first interface toproject from the header side into the header. The electrical componentincludes a second generally planar electrically conductive interface.The first and second interfaces are in electrical contact.

Disclosed herein is a method of manufacturing an implantable pulsegenerator. In one embodiment, the method includes: providing a feedthruincluding a generally planar electrically conductive interface;providing an electrical component including a generally planarelectrically conductive interface; and placing the interfaces inphysical contact with each other, for example, via a pick-and-placeprocess.

Disclosed herein is an implantable pulse generator. In one embodiment,the implantable pulse generator includes a feedthru and an electricalcomponent. The feedthru includes a generally planar electricallyconductive interface. The electrical component includes a generallyplanar electrically conductive interface in abutting contact with thefeedthru interface. The abutting contact may be achieved via apick-and-place process.

While multiple embodiments are disclosed, still other embodiments of thepresent invention will become apparent to those skilled in the art fromthe following Detailed Description, which shows and describesillustrative embodiments of the invention. As will be realized, theinvention is capable of modifications in various aspects, all withoutdeparting from the spirit and scope of the present invention.Accordingly, the drawings and detailed description are to be regarded asillustrative in nature and not restrictive.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is an isometric view of a prior art pulse generator illustratingfeedthrus electrically coupled to lead connector blocks.

FIG. 1B is an isometric view of a prior art pulse generator illustratinga feedthru electrically coupled to a RF antenna.

FIG. 2 is a cross-sectional elevation of one of the prior art feedthrusof FIG. 1A or 1B.

FIG. 3 is a top isometric view of the feedthru of the presentdisclosure.

FIG. 4 is a bottom isometric view of the feedthru of FIG. 3.

FIG. 5 is an exploded bottom isometric view of the feedthru of FIG. 3.

FIG. 6 is a longitudinal cross-section of the feedthru as taken alongsection line 6-6 of FIG. 4.

FIG. 7A is a top plan view of a printed circuit board, wherein thefeedthru of FIG. 3 is hidden and multiple conductive traces are shown.

FIG. 7B is a top plan view of the printed circuit board of FIG. 7A,wherein the feedthru is hidden and alternative conductive traces areshown.

FIG. 8 is a longitudinal cross-section of the printed circuit board astaken along section line 8-8 in FIG. 7A, wherein the feedthru is shownconnected to the board.

DETAILED DESCRIPTION

The present disclosure describes a feedthru 155 of an implantable pulsegenerator 5 such as a pacemaker, defibrillator or ICD. The feedthru 155disclosed herein provides an electrically insulated passageway throughwhich the feedthru wire 160 can pass through the can wall 65. Thefeedthru 155 also prevents RF radiation from escaping the feedthru wire160 and interfering with other electrical components of the pulsegenerator 5. In one embodiment, when the feedthru 155 is employed forthe purpose depicted in FIG. 1A, the feedthru 155 will allow thefeedthru wire 160 to pass through the can wall 65 as the feedthru wire160 extends between the blocks 20 of the header 10 and the electricalcomponents enclosed within the can 15. In some embodiments, when thefeedthru 155 is employed for the purpose depicted in FIG. 1B, thefeedthru wire 160 of the feedthru 155 may be connected to an RF antenna37 to couple electrical components within the can 15 to the antenna 37to promote wireless communication between the implantable pulsegenerator 5 and a programmer, such as a computer.

The feedthru 155 disclosed herein includes an interface 190 on the canside 175 of the feedthru 155 that is configured to facilitate theelectrical connection of the feedthru 155 to an electrical component 180via pick-and-place manufacturing methods, wherein the electricalcomponent 180 is housed or to be housed within the walls 65 of the can15. The feedthru 155 reduces manufacturing costs by reducing the amountof wire used for a feedthru wire 160 and increasing production speed viaa higher degree of automation. Additionally, the feedthru 155 savesspace within the pulse generator 5 by reducing the space necessary forthe attachment of the feedthru wire 160 to a PCB 185 or other feature ofthe electrical components 180.

For a detailed discussion of an embodiment of the feedthru 155 disclosedherein, reference is first made to FIGS. 3-6. FIGS. 3-5 are,respectively, top isometric, bottom isometric, and exploded bottomisometric views of the feedthru 155. FIG. 6 is a longitudinalcross-section of the feedthru 155 as taken along section line 6-6 ofFIG. 4, which extends along a longitudinal axis of the feedthru 155 andthe feedthru wire 160 extending therethrough.

As shown in FIGS. 3-4, in one embodiment, the feedthru 155 includes aheader side 170, a can side 175, and a circular side 195 that may varyin diameter such that the circular side 195 has the appearance of beingassembled from a plurality of stacked circular rings having differentdiameters. The varying diameter of the circular side 195 may define agroove or slot 200 that receives the wall 65 of the can 15 when thefeedthru 155 is assembled into the can 15. The feedthru wire 160 extendsfrom the header side 170, but is generally flush with, or recessedrelative to, the interface 190 on the can side 175. In one embodiment,the feedthru 155 is unipolar and may have a single feedthru wire 160. Insome embodiments, the feedthru 155 may be multipolar and may havemultiple feedthru wires 160.

As can be understood from FIGS. 4-6, the feedthru 155 includes thefeedthru wire 160, a feedthru housing 210, a core 215, a can-side endpiece or plate 255, and ground wires 225. The housing 210 includes thecircular side 195, a groove or slot 200, a central or core-receivingbore 226 and ground wire-receiving bore 230. The housing 210 may bemachined, molded or otherwise formed to fit the space and designconstraints of a printed circuit board of an implantable pulse generator5. The housing may be titanium, a titanium alloy, or nickel.

The outer circumference of the housing 210 is defined by the circularside 195 and includes the groove or slot 200. The central bore 226 ofthe housing 210 extends axially through the housing 210 and may have astepped cylindrical construction. The central bore 226 of the housing210 defines a passageway to receive the core 215.

As shown in FIG. 5, the bottom or can side 235 of the housing 210includes ground wire bores 230 b. The ground wire bores 230 b generallycorrespond to ground wire bores 230 a in the plate 255 to formcontinuous ground wire bores 230 that extend through the plate 255 andinto the housing 210. The ground wire bores 230 b in the plate may be acounterbore, that is, a cylindrical flat bottomed opening which enlargesanother opening.

As indicated in FIGS. 5 and 6, the core 215 includes a first cylindricalportion 240, a second cylindrical portion 245 and a feedthru wire bore250 extending longitudinally therethrough. The bore 250 receives thefeedthru wire 160 and provides an insulating passageway for the feedthruwire 160 to extend through the core 215 and, as a result, the feedthru155. The core 215 may be ceramic.

The outer circumferential surface of the core 215 is cylindricallystepped such that it has a first cylindrical portion 240 and a secondcylindrical portion 245 with a diameter greater than the diameter of thefirst cylindrical portion 240.

As can be understood from FIGS. 3 and 6, the core 215 is received in thecentral bore 226 of the housing 210 such that the second cylindricalportion 245 abuts a step 250 in the central bore 226 of the housing 210,and the first cylindrical portion 240 is exposed at the header side 170of the feedthru 155.

As illustrated in FIGS. 5 and 6, the plate 255 includes an outercircumferential surface 260, a core side 265, and the interface side266. The outer circumferential surface 260 of the plate 255 and theouter circumference of the housing 210 define the outer circumference ofthe feedthru 155. The body of the plate 255 can be any insulatingmaterial, such as ceramic, that is brazable.

As depicted in FIGS. 4 and 6, the core side 265 of the plate 255 abutsagainst the can side 235 of the housing 210 when the feedthru 155 isassembled. In an alternative embodiment, the core side 265 of the plate255 is adapted to receive the housing 210. In other words, the bottom orcan side 235 of the housing 210 is received in the core side 265 of theplate 255.

As illustrated in FIGS. 5 and 6, the interface side 266 includes theplanar electrically conductive interface 190 having electrical traces270, 271 with bores 230, 275 defined therein. At least one bore 230 isadapted to receive a ground wire 225 and the ground wire 225electrically connects the outer or ground electrical trace 270 with thehousing 210. In one embodiment, there are three bores 230 located at theouter or ground electrical trace 270. In alternative embodiments, theremay be four or more bores 230 or there may be two or fewer bores 230,each having a respective ground wire 225 located therein.

In one embodiment, the traces 270, 271 of the planar electricallyconductive interface 190 may be in the form of two concentric rings. Forexample, as indicated in FIGS. 4 and 5, the inner trace 271 may be inthe form of a solid or continuous disk or circle or in the form of acontinuous ring. The outer trace 270 is radially spaced apart from theinner trace 271 such that the insulative material of the body of theplate 255 is exposed and a ring space 182 insulates the traces 270, 271from each other. The outer trace 270 may be in the form of a continuousring. The electrically conductive traces 270, 271 may be formed of anyelectrically conductive material (e.g. gold plated with a nickel base,copper, tungsten, etc.) capable of being formed into a trace via anymethod including photo etching, deposition, etc. In alternativeembodiments, there may be more or less than two traces 270, 271 or thetraces may not be concentric with respect to each other. The traces 270,271 may also be non-continuous. For example, the traces 270, 271 may besegmented arcuate portions forming a segmented circular trace. Thetraces 270, 271 may also have other shapes besides arcuate or curvedshapes. For example, the shapes may be rectangular or linear.

As shown in FIGS. 4, 5 and 6, the feedthru wire 160 includes a headerend 290 and a can end 295. As can be understood from FIGS. 4-6, thefeedthru wire 160 is received in the center or feedthru wire bore 275 atthe center of the plate 255 such that the can end 295 of the feedthruwire 160 is generally flush with, or recessed relative to, the interfaceside 266 of the plate 255. The feedthru wire 160 is generallycylindrical and is flattened or stamped at its can end 295 to form ahead 295. In alternative embodiments, the can end 295 of the feedthruwire 160 may be another configuration besides flattened or stamped. Uponplacement (e.g. via pick and place technology) or connection onto theprinted circuit board, the feedthru wire 160 will be in electricalconnection or electrical communication with the other electricalcomponents. In one embodiment, the feedthru wire 160 is an RF lead suchthat the feedthru 155 may be employed for the purpose depicted in FIG.1B. In one embodiment, the feedthru wire 160 is a connector block leadsuch that the feedthru 155 may be employed for the purpose depicted inFIG. 1A. The feedthru wire 160 may be made of Pt/Ir wire, such as 90%Pt/10% Ir wire, or other electrically conductive materials.

As indicated in FIGS. 5 and 6, each ground wire 225 includes a plate end300 and a housing end 305. As can be understood from FIGS. 4 and 5, eachground wire 225 is received in a ground wire bore 230 such that theplate end 300 of the ground wire 225 is generally flush, or recessedrelative to, the plate 255. In one embodiment, the ground wire 225 isgenerally cylindrical and is flattened or stamped at its plate end 300to form a head 300. In alternative embodiments, the plate end 300 may beother configurations besides stamped or flattened. The ground wire 225may be made of Pt/Ir wire, such as 90% Pt/10% Ir wire, or otherelectrically conductive materials.

As can be understood from FIGS. 3, 4 and 6, to assemble the feedthru155, the housing 210 and the core 215 may be connected by brazing,welding, or soldering to form a housing-core assembly or complex 310.The plate 255 may be connected to the housing-core assembly 310 bybrazing, soldering, or welding. The ground wires 225 and the feedthruwire 160 may be placed through the bores 230, 275 in the plate 255 andhousing-core assembly 310 until the ends 300, 295 of the wires 225, 160are generally flush, or recessed relative to the openings 230, 275. Theends 300, 295 of the wires 225, 160 may also be connected to therecessed openings of the bores 230, 275 by brazing, soldering, orwelding.

As can be understood from FIG. 6, there is an open area 320 between thecan side of the core 215, the core side of the plate 255 and theinternal circumference of the central bore 226 of the housing 210. Thisopen area 320 may provide for ease of the feedthru assembly process.

As indicated in FIG. 6, the feedthru trace 271 may include planarportions 271 a that are generally planar and flush with the planar faceof the interface side 266. The feedthru trace 271 may also include arecessed portion 271 b that lines the bore 275 with trace material. Insome embodiments, the trace material may even line the recess openingand shaft portion of the bore 275 as it extends through the plate 255.The trace material may even extend out of the bore 275 on the core side265 of the bore 275 to define a ring of trace material about the openingof the bore 275 on the core side 265.

As shown in FIG. 6, the conductor trace 270 may include planar portions270 a that are generally planar and flush with the planar face of theinterface side 266. The conductor trace 270 may also include a recessedportion 270 b that lines the bore 230 with trace material. In someembodiments, the trace material may even line the recess opening andshaft portion of the bore 230 as it extends through the plate 255. Thetrace material may even extend out of the bore 230 on the core side 265of the bore 230 to define a ring of trace material about the opening ofthe bore 230 on the core side 265.

For a discussion of the location and orientation of the feedthru 155 ona printed circuit board 185 housed within the can 15 of an implantablepulse generator 5, reference is now made to FIGS. 7A and 7B. FIG. 7A isa top plan view of a printed circuit board 185, wherein the feedthru 155of FIG. 3 is hidden and multiple conductive traces 320, 325 are shown.FIG. 7B is a top plan view of the printed circuit board 185 of FIG. 7A,wherein the feedthru 155 is hidden and alternative conductive traces 325are shown.

As shown in FIG. 7A and with reference to FIG. 4, the printed circuitboard 185 includes electrical components 180 and power and groundconductive traces 320, 325 that form a planar electrically conductiveinterface 400 of the board 185. The conductive traces 320, 325 of theboard interface 400 correspond to the power and ground conductive traces271, 270 found on the planar electrically conductive interface 190 atthe interface side 266 of the plate 255. In one embodiment, all traces271, 270, 320, 325 are generally continuous rings or disk shapedconfigurations. In one embodiment, the feedthru 155 is aligned withrespect to each respective conductive trace to maintain an electricalconnection between the ground traces 270, 325 of the feedthru 155 andthe printed circuit board 185, and the power traces 271, 320 of theprinted circuit board 185 and the feedthru 155.

As can be understood from FIG. 7B, the feedthru conductive traces 271,270 may be aligned with alternatively shaped conductive traces 320, 325on the printed circuit board 185. That is, the power conductive trace271 that places the feedthru wire 160 in electrical communication withthe power side of the board 185 is aligned with the power conductivetrace 320. The ground conductive trace 270 that places the ground wires225 in electrical communication with the ground side of the board 185may be aligned with a ground conductive trace 325 of any shape or sizesuch that the electrical connection between the feedthru wire 160 andthe printed circuit board 185 is maintained. For example, the groundconductive traces 325 of the board 185 could be segmented such that itis one or more arcuate segments or any other shape or configuration, andthe ground conductive trace 270 of the feedthru 155 is a continuouscircle or ring. In other embodiments, the reverse configuration is thecase, with the ground trace 270 of the feedthru 155 segmented and theground trace 325 of the board 185 a continuous ring.

For a discussion of the feedthru 155 and its relationship to the printedcircuit board 185, reference is now made to FIG. 8. FIG. 8 is alongitudinal cross-section of the printed circuit board 185 as takenalong section line 8-8 in FIG. 7A, wherein the feedthru 155 is shownconnected to the board 185. As can be understood from FIGS. 7A-8, whenthe feedthru 155 is properly coupled to the printed circuit board 185such that the interfaces 190, 400 are properly aligned and in abuttingplanar contact with each other, the feedthru 155 is in electricalcommunication with the electrical components 180 of the board 185. Morespecifically, the can wall 65, which is electrically coupled to thefeedthru housing 210, is in electrical communication with the groundside of the board 185 via the electrical pathway extending along thewires 225, traces 271, 325 and along the conductors or traces 335extending to the ground side of each component 180. Similarly, thefeedthru wire 160 is in electrical communication with the power side ofthe board 185 via the electrical pathway extending along the wire traces270, 325 and along conductors or traces 330 extending to the power sideof each component 180.

As discussed previously, the feedthru 155 can be placed in anyorientation on a printed circuit board 185 such that the conductivetraces 271, 270 of the feedthru interface 190 maintain electricalcontact with corresponding traces 320, 325 of the interface 400 of theprinted circuit board 185. As a comparison of FIGS. 2 and 8 shows, thefeedthru 155 does not require a through-hole or use through-holeassembly technology. Instead, the feedthru 155 disclosed herein isconfigured to allow pick and place technology, thus reducingmanufacturing costs by increasing efficiency and production speed via ahigher degree of automation. Because the feedthru 155 does not require athrough-hole, space on the opposite side of the board may be utilizedfor other components 180. This may allow for a printed circuit boardwith a reduced size. Additionally, the layers of flex of the circuitboard are not penetrated. Also, because the printed circuit board may bea ceramic, it protects the relatively low melting point solder frommelting and breaking electrical connections. Further, the feedthru 155electrically shields the feedthru wire 160 and prevents RF radiationfrom escaping and interfering with other electrical components.

Although the present invention has been described with reference topreferred embodiments, persons skilled in the art will recognize thatchanges may be made in form and detail without departing from the spiritand scope of the invention.

What is claimed is:
 1. A method of manufacturing an implantable pulsegenerator, the method comprising: providing a header and a can;extending a feedthru between the header and the can, the feedthru havinga header side, a can side, and a feedthru wire, the can side having afirst generally planar electrically conductive interface, the feedthruwire having a header end and a can end, and the feedthru wire extendingthrough the feedthru from the first interface to project from the headerside into the header; disposing an electrical component inside the can,the electrical component having a side abutted and attached to the canside such that the side of the electrical component covers the can endof the feedthru wire, and the side of the electrical component having asecond generally planar electrically conductive interface; and placingthe interfaces in physical contact with each other.
 2. The method ofclaim 1, wherein the interfaces are placed in physical contact via apick-and-place process.
 3. The method of claim 1, wherein the electricalcomponent comprises at least one of a hybrid, output flex and printedcircuit board.
 4. The method of claim 3, wherein the first generallyplanar electrically conductive interface comprises a power electricaltrace and a ground electrical trace spaced apart from each other, andthe second generally planar electrically conductive interfaces comprisesa power electrical trace and a ground electrical trace spaced apart fromeach other.
 5. The method of claim 4, wherein placing the interfaces inphysical contact causes the power electrical traces to abut and theground electrical traces to abut.
 6. The method of claim 1, wherein thefirst generally planar electrically conductive interface comprises afirst electrically conductive trace electrically coupled with the canend of the feedthru wire, the second generally planar electricallyconductive interface comprises a second electrically conductive traceelectrically coupled with a power side of the electrical component, andthe first and second traces are in abutting electrical contact.
 7. Themethod of claim 6, wherein the first generally planar electricallyconductive interface further comprises a third electrically conductivetrace electrically coupled with a ground side of the feedthru, thesecond generally planar electrically conductive interface furthercomprises a second electrically conductive trace electrically coupled toa ground side of the electrical component, and the first and secondtraces are in abutting electrical contact.
 8. The method of claim 7,wherein at least one of the traces comprises a recessed portion that isat least one of generally recessed relative to the rest of the firstelectrical trace and generally recessed relative to the rest of thegenerally planar electrically conductive interfaces.
 9. The method ofclaim 7, wherein at least one of the traces comprises a border that isarcuate along at least a portion thereof.
 10. The method of claim 7,wherein the traces of at least one of the generally planar electricallyconductive interfaces form concentric circles.